What is the most common lock used in a residence?

The single cylinder entry lock is the most common lock used in residences due to its practicality and ease of use. This type of lock operates with a key on the outside and a thumb turn on the inside, making it convenient for homeowners to quickly unlock their doors from within without needing a key. Its design is also relatively simple, which contributes to its popularity among builders and homeowners alike.

The single cylinder entry lock strikes a balance between security and accessibility, which is a key consideration for residential applications. It provides a sufficient level of security for typical residential use while allowing residents to have quick access to their homes. Additionally, the installation process for these locks is straightforward, making them a common choice for both new constructions and replacements in existing homes.

While other options like deadbolts and mortise locks offer different levels of security and functionality, the single cylinder entry lock remains favored for its suitability in day-to-day residential life. Many homeowners often augment their security by pairing a single cylinder entry lock with a deadbolt for added protection.